Maybe Lactuca serriola - prickly lettuce. Just because it has 'lettuce' in its name doesn't make it edible.

How did you manage to retire if you were born in 1960? You are just a young 'un!

Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Oh that is so cool. Prickly lettuce is the first must have plant I posted on my profile. Thought I might have collected it two years ago and have been adding it to my diet since. Been sorta of an argument here over it with a garden gal who raises dandelions to make jelly. Definitely gonna keep growing it and seed saving. Next year I'm gonna be raising some Lactuca virosa if anyone is interested